package com.food.service.impl;


import com.food.dto.GoodsSalesDTO;
import com.food.entity.Orders;
import com.food.mapper.OrderMapper;
import com.food.mapper.UserMapper;
import com.food.service.ReportService;
import com.food.service.WorkspaceService;
import com.food.vo.*;
import io.swagger.models.auth.In;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
   @Autowired
   private WorkspaceService workspaceService;

    /**
     * 营业额统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getturnoverStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放从begin到end范围内的每天的日期，dateList
        List<LocalDate > datelist = new ArrayList<>();
        datelist.add(begin);
        while (!begin.equals(end)){
            //日期计算，计算指定日期的后一天对应的日期
            begin=begin.plusDays(1);
            datelist.add(begin);
        }


        //存放每天的营业额
        List<Double> turnoverList=new ArrayList<>();
        for (LocalDate date : datelist) {
            //查询date日期对应的营业额数据，营业额是指：状态为“已完成”的订单金额合计
           LocalDateTime beginTime= LocalDateTime.of(date, LocalTime.MIN);
           LocalDateTime endTime= LocalDateTime.of(date, LocalTime.MAX);
            //select sum（amount） from  orders where order_time> beginTime and order_time < endTime=and status=5
            Map map=new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
           Double turnover=orderMapper.sumByMap(map);
           turnover=turnover==null ? 0.0 :turnover;
           turnoverList.add(turnover);
        }
        //封装返回结果
        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(datelist,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }

    /**
     * 用户统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getuserStatistics(LocalDate begin, LocalDate end) {
        //存放从begin到end之间的每天对应的日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            //日期计算，计算指定日期的后一天对应的日期
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天的新增用户数量  select count(id) from user where create_time <? and create_time>?
        List<Integer> newUserList=new ArrayList<>();
        //存放每天的总用户数量select count(id) from user where create_time <?
        List<Integer> totalUserList=new ArrayList<>();


        //存放每天的营业额
        List<Double> turnoverList=new ArrayList<>();

        for (LocalDate date : dateList) {
            //查询date日期对应的营业额数据，营业额是指：状态为“已完成”的订单金额合计
            LocalDateTime beginTime= LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime= LocalDateTime.of(date, LocalTime.MAX);
            Map map=new HashMap();
            map.put("end",endTime);

            //总用户数量
            Integer totalUser=userMapper.countByMap(map);

            map.put("begin",beginTime);
            //新增用户数量
             Integer newUser=userMapper.countByMap(map);

            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }

        //封装返回结果
        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .build();

    }

    /**
     * 订单统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //存放从begin到end之间的每天对应的日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            //日期计算，计算指定日期的后一天对应的日期
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天的订单总数
        List<Integer> orderCountList=new ArrayList<>();
        //存放每天的有效订单数
        List<Integer> validOrderCountList=new ArrayList<>();

        for (LocalDate date : dateList) {
            //查询每天的订单总数  select count(id) from orders where order_time <? and order_time>?
            LocalDateTime beginTime= LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime= LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount=getOrderCount(beginTime,endTime,null);
            //查询每天的有效订单数  select count(id) from orders where order_time <? and order_time>?  and status=5
            Integer  vailOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            orderCountList.add(orderCount);
            validOrderCountList.add(vailOrderCount);
        }
        //计算时间区间内的总订单总数量
       Integer totalOrderCount= orderCountList.stream().reduce(Integer::sum).get();
        //计算时间区间内的有效订单数量
        Integer validOrderCount= validOrderCountList.stream().reduce(Integer::sum).get();
       //计算订单完成率
        Double orderCompletionRate=0.0;
        if(totalOrderCount!=0) {
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }
        //封装返回结果
        return OrderReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();

    }



    /**
     * 根据条件统计订单数量
     * @param begin
     * @param end
     * @param status
     * @return
     */
    private  Integer getOrderCount(LocalDateTime begin ,LocalDateTime end, Integer status){
        Map map=new HashMap();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status", status);
        return  orderMapper.countByMap(map);
    }

    /**
     * 销量排名top10
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {

            //查询每天的订单总数  select count(id) from orders where order_time <? and order_time>?
            LocalDateTime beginTime= LocalDateTime.of(begin, LocalTime.MIN);
            LocalDateTime endTime= LocalDateTime.of(end, LocalTime.MAX);
            List<GoodsSalesDTO> salesTOp10=orderMapper.getSalesTop10(beginTime,endTime);
           List<String> names= salesTOp10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
           String nameList=StringUtils.join(names,",");
           List<Integer> numbers=salesTOp10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
           String numberList=StringUtils.join(numbers,",");
           //封装返回结果数据
            return  SalesTop10ReportVO
                    .builder()
                    .nameList(nameList)
                    .numberList(numberList)
                    .build();




    }

    /**
     * 导出运营数据表
     * @param response
     */
    @Override
    public void exportBusinessData(HttpServletResponse response) {
        //1、查询数据库，获取营业数据--查询最近30天的运营数据
        LocalDate dateBegin=LocalDate.now().minusDays(30);
        LocalDate dateEnd=LocalDate.now().minusDays(1);
       //查询概览数据
        BusinessDataVO businessDataVO=workspaceService.getBusinessData( LocalDateTime.of(dateBegin,LocalTime.MIN),LocalDateTime.of(dateEnd,LocalTime.MAX));

        //2、通过POI将数据写入到Excel文件中
        InputStream in= this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        //基于模板文件创建一个新的Excel文件
        try {
            XSSFWorkbook excel = new XSSFWorkbook(in);
            //获取表格文件的Sheet页
            XSSFSheet sheet=excel.getSheet("sheet1");
            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间："+dateBegin+"至"+dateEnd);
            //获取第4行
           XSSFRow row= sheet.getRow(3);
           row.getCell(2).setCellValue(businessDataVO.getTurnover());
           row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
           row.getCell(6).setCellValue(businessDataVO.getNewUsers());
           //获得第5行
          row= sheet.getRow(4);
          row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
          row.getCell(4).setCellValue(businessDataVO.getUnitPrice());


          //填充明细数据
            for (int i=0; i<30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessDataVO.getTurnover());
                row.getCell(3).setCellValue(businessDataVO.getValidOrderCount());
                row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessDataVO.getUnitPrice());
                row.getCell(6).setCellValue(businessDataVO.getNewUsers());
            }
            //3、通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);
            //关闭资源
            out.close();
            excel.close();
    } catch (IOException e) {
            e.printStackTrace();
        }
        }
    }
